<template>
    <el-row class="login-page">
        <el-col :span="12" class="bg"></el-col>
        <el-col :span="6" :offset="3" class="form">
            <!-- 注册表单 -->
            <el-form ref="form" size="large" autocomplete="off" v-if="isRegister" :model="registerData" :rules="rules">
                <el-form-item>
                    <h1>注册</h1>
                </el-form-item>
                <el-form-item prop="username">
                    <el-input :prefix-icon="User" placeholder="请输入用户名" v-model="registerData.username"></el-input>
                </el-form-item>
                <el-form-item prop="password">
                    <el-input :prefix-icon="Lock" type="password" placeholder="请输入密码"
                              v-model="registerData.password"></el-input>
                </el-form-item>
                <el-form-item prop="rePassword">
                    <el-input :prefix-icon="Lock" type="password" placeholder="请输入再次密码"
                              v-model="registerData.rePassword"></el-input>
                </el-form-item>
                <!-- 注册按钮 -->
                <el-form-item>
                    <el-button class="button" type="primary" auto-insert-space @click="register">
                        注册
                    </el-button>
                </el-form-item>
                <el-form-item class="flex">
                    <el-link type="info" :underline="false" @click="isRegister = false;clearRegisterData()">
                        ← 返回
                    </el-link>
                </el-form-item>
            </el-form>
            <!-- 登录表单 -->
            <el-form ref="form" size="large" autocomplete="off" v-else :model="registerData" :rules="rules">
                <el-form-item>
                    <h1>登录</h1>
                </el-form-item>
                <el-form-item prop="username">
                    <el-input :prefix-icon="User" placeholder="请输入用户名" v-model="registerData.username"></el-input>
                </el-form-item>
                <el-form-item prop="password">
                    <el-input name="password" :prefix-icon="Lock" type="password" placeholder="请输入密码"
                              v-model="registerData.password"></el-input>
                </el-form-item>
                <el-form-item class="flex">
                    <div class="flex">
                        <el-checkbox>记住我</el-checkbox>
                        <el-link type="primary" :underline="false">忘记密码？</el-link>
                    </div>
                </el-form-item>
                <!-- 登录按钮 -->
                <el-form-item>
                    <el-button class="button" type="primary" auto-insert-space @click="login">登录</el-button>
                </el-form-item>
                <el-form-item class="flex">
                    <el-link type="info" :underline="false" @click="isRegister = true;clearRegisterData()">
                        注册 →
                    </el-link>
                </el-form-item>
            </el-form>
        </el-col>
    </el-row>
</template>

<script setup>
    import {User, Lock} from '@element-plus/icons-vue'
    import {ElMessage} from "element-plus";
    import {ref} from 'vue'
    //控制注册与登录表单的显示， 默认显示注册
    const isRegister = ref(false)
    // 定义数据模型
    const registerData = ref({
        username: "",
        password: "",
        rePassword: ""
    })

    // 校验密码的函数
    const checkRePassword = (rule, value, callback) => {
        if (value === "") {
            callback(new Error("请再次确认密码"))
        } else if (value !== registerData.value.password) {
            callback(new Error("请确保两次输入的密码一样"))
        } else {
            callback()
        }
    }

    // 定义表单校验规则
    const rules = {
        username: [
            {require: true, message: "请输入用户名", trigger: "blur"},
            {min: 5, max: 16, message: "长度为5~16位非空字符", trigger: "blur"}
        ],
        password: [
            {require: true, message: "请输入密码", trigger: "blur"},
            {min: 5, max: 16, message: "长度为5~16位非空字符", trigger: "blur"}
        ],
        rePassword: [
            {validator: checkRePassword, trigger: "blur"}
        ]
    }

    // 调用后台接口完成注册
    import {userLoginService, userRegisterService} from "@/api/user";
    import {useRouter} from "vue-router";
    import {useTokenStore} from "@/stores/token";

    const router = useRouter();
    const register = async () => {
        // registerData 是一个响应式对象，如果需要获取值，需要.value
        let result = await userRegisterService(registerData.value)
        ElMessage.success(result.message ? result.message : "注册成功")
    }

    // 绑定数据，复用注册表单的数据模型
    // 表单数据校验
    // 登录函数
    const tokenStore = useTokenStore();
    const login = async () => {
        // 调用接口，完成登录
        let result = await userLoginService(registerData.value);
        ElMessage.success(result.message ? result.message : "登录成功");

        // 把得到的 token 存储到 pinia 中
        tokenStore.setToken(result.data)

        // 跳转到首页, 路由完成跳转
        await router.push("/");
    }

    // 定义函数，清空数据模型的数据
    const clearRegisterData = () => {
        registerData.value = {
            username: "",
            password: "",
            rePassword: ""
        }
    }

</script>

<style lang="scss" scoped>
  /* 样式 */
  .login-page {
    height: 100vh;
    background-color: #fff;

    .bg {
      background: url('@/assets/logo2.png') no-repeat 60% center / 240px auto,
      url('@/assets/login_bg.jpg') no-repeat center / cover;
      border-radius: 0 20px 20px 0;
    }

    .form {
      display: flex;
      flex-direction: column;
      justify-content: center;
      user-select: none;

      .title {
        margin: 0 auto;
      }

      .button {
        width: 100%;
      }

      .flex {
        width: 100%;
        display: flex;
        justify-content: space-between;
      }
    }
  }

</style>
